An object A, on planet X has a weight of 50.0 N. It takes 4.0 sec for A to reach the surface when released from a height of 200m. The weight (in N) of A on earth is:

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

If forces acting on an object are unbalanced. true or false

Ablock of mass m slides on a horizontal frictionless table with an initial speed v0 . it then compresses a spring of force constant k and is brought to rest. the acceleration of gravity is 9.8 m/s2. how much is the spring compressed x from its natural length? 1) x = v0*sqrt(k/(mg)) 2) x=v0*sqrt(m/k) 3) x=v0*((mk)/g) 4) x=v0*sqrt(k/m) 5) x=v0*(m/kg) 6) x=v0*sqrt((mg)/k) 7) x=(v0)^2/(2g) 8) x=v0*(k/(mg)) 9) x=(v0)^2/(2m) 10) x=v0*((mg)/k)